—Is it necessary to look up every new word when I come across it in reading?
—No. You ________， because you are likely to guess the meaning from the context.
A．can'tB．mustn't
C．don't have to D．ought not to
C

試題分析:句意：---當(dāng)我在閱讀中遇到每一個生詞的時候有必要去查字典嗎？---沒必要，因為你有可能從上下文中猜出意思來。A不能；B禁止；C沒必要；D不應(yīng)該。根據(jù)句意可知說話人認為沒必要這樣做，故答案選C。
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